1. “That must be a mistake.” “No，it ＿＿＿＿be a mistake.”

    A. mustn’tB. needn’tC. can’t D. wouldn’t

    2.“The summer holiday is drawing near. Are you going home for the holiday?” “I haven’t decided yet. I ＿＿＿＿go home， but it depends on the weather.”

    A. mustB. needC. mayD. will

    3.“How about Rose? She asked for sick leave yesterday.”“You ＿＿＿＿worry about her； she ＿＿＿＿ well already.” ......